@inproceedings{c77adc4c0ef14028950ff1983b1fc321,
title = "The optomechanical design of the Quad-camera Wavefront-sensing Six-channel Speckle Interferometer (QWSSI)",
abstract = "The Quad-camera Wavefront-sensing Six-channel Speckle Interferometer (QWSSI) is a new speckle imaging instrument available on the 4.3-m Lowell Discovery Telescope (LDT). QWSSI is built to efficiently make use of collected photons and available detector area. The instrument images on a single Electron Multiplying CCD (EMCCD) at four wavelengths in the optical (577, 658, 808, and 880nm) with 40nm bandpasses. Longward of 1μm, two imaging wavelengths in the NIR are collected at 1150 and 1570nm on two InGaAs cameras with 50nm bandpasses. All remaining non-imaging visible light is then sent into a wavefront EMCCD. All cameras are operated synchronously via concurrent triggering from a timing module. With the simultaneous wavefront sensing, QWSSI characterizes atmospheric aberrations in the wavefront for each speckle frame. This results in additional data that can be utilized during post-processing, enabling advanced techniques such as Multi-Frame Blind Deconvolution. The design philosophy was optimized for an inexpensive, rapid build; virtually all parts were commercial-off-the-shelf (COTS), and custom parts were fabricated or 3D printed on-site. QWSSI's unique build and capabilities represent a new frontier in civilian high-resolution speckle imaging.",
keywords = "Diffraction-limited imaging, Instrument design, Speckle imaging, Stellar proper- ties, Wavefront-sensing",
author = "Clark, {Catherine A.} and {Van Belle}, {Gerard T.} and Horch, {Elliott P.} and Trilling, {David E.} and Hartman, {Zachary D.} and Michael Collins and {Von Braun}, Kaspar and Jeff Gehring",
note = "Funding Information: We are grateful to our telescope operators and operations group during commissioning and our first nights of science operations: Amanda Bosh, Victoria Girgis, Ana Hayslip, Ishara Nisley, Sydney Perez, Jason Sanborn, LaLaina Shumar, and Kathryn Turrentine. We thank those in the Lowell Observatory technical group who provided valuable feedback on QWSSI{\textquoteright}s optical design: Tom Bida, Ted Dunham, Ryan Hamilton, Stephen Levine, Dyer Lytle, and Ralph Nye. We are grateful for the support from Lowell Observatory IT: C. J. von Buchwald-Wright and Scott Do. During our procurement phase, we received extensive support from the Lowell Observatory business office: Lucy Collins, Robin Melena, Le Cam Nguyen, and Diana Weintraub. Finally, we thank Nic Scott for his helpful comments. Support for this project was provided in part by Defense University Research Instrumentation Program awards, as well as NSF Grant No. AST-1616084. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Optical and Infrared Interferometry and Imaging VII 2020 ; Conference date: 14-12-2020 Through 22-12-2020",
year = "2020",
doi = "10.1117/12.2563055",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Tuthill, {Peter G.} and Antoine Merand and Stephanie Sallum",
booktitle = "Optical and Infrared Interferometry and Imaging VII",
}